The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.
Boron doped ultrastrong and ductile high-entropy alloys
Abstract
Abstract A new class of materials called high-entropy alloys (HEAs) constitutes multiple principal elements in similar compositional fractions. The equiatomic Fe20Mn20Cr20Co20Ni20 (at%) HEA shows attractive mechanical properties, particularly under cryogenic conditions. Yet, it lacks sufficient yield and ultimate tensile strengths at room temperature. To strengthen these materials, various strategies have been proposed mainly by tuning the composition of the bulk material while no efforts have been made to decorate and strengthen the grain boundaries. Here, we introduce a new HEA design approach that is based on compositionally conditioning the grain boundaries instead of the bulk. We found that as little as 30 ppm of boron doping in single-phase HEAs, more specific in an equiatomic FeMnCrCoNi and in a non-equiatomic Fe40Mn40Cr10Co10 (at%), improves dramatically their mechanical properties, increasing their yield strength by more than 100% and ultimate tensile strength by ∼40% at comparable or even better ductility. Boron decorates the grain boundaries and acts twofold, through interface strengthening and grain size reduction. These effects enhance grain boundary cohesion and retard capillary driven grain coarsening, thereby qualifying boron-induced grain boundary engineering as an ideal strategy for the development of advanced HEAs.
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A critical review of high entropy alloys and related concepts
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Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off
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Self-citationOtto, F., Dlouhý, A., Somsen, C., Bei, H., Eggeler, G., & George, E. P. (2013) · Acta Materialia · doi:10.1016/j.actamat.2013.06.018 · Cited by 3,352
Refractory high-entropy alloys
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Cited by
High entropy alloys: A focused review of mechanical properties and deformation mechanisms
George, E. P., Curtin, W. A., & Tasan, C. C. (2020) · Acta Materialia · doi:10.1016/j.actamat.2019.12.015 · Cited by 1,917
A 3D printable alloy designed for extreme environments
Smith, T. M., Kantzos, C. A., Zarkevich, N. A., Harder, B. J., Heczko, M., Gradl, P. R., Thompson, A. C., Mills, M. J., Gabb, T. P., & Lawson, J. W. (2023) · Nature · doi:10.1038/s41586-023-05893-0 · Cited by 269
Kang, Y., Tang, Y., Zhu, L., Jiang, B., Xu, X., Guselnikova, O., Li, H., Asahi, T., & Yamauchi, Y. (2022) · ACS Catalysis · doi:10.1021/acscatal.2c03480 · Cited by 107
Metadata
- Authors
- Seol, J. B., Bae, J. W., Li, Z., Chan Han, J., Kim, J. G., Raabe, D., & Kim, H. S.
- Venue
- Acta Materialia
- Publisher
- Elsevier BV
- Published
- 2018-06
- Volume
- 151
- Pages
- 366-376
- ISSN
- 1359-6454 (ISSN-L)
- OpenAlex
- W2797828926
- Cited by
- 375
- References
- 26
- FWCI
- 18.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Seol, J. B., Bae, J. W., Li, Z., Chan Han, J., Kim, J. G., Raabe, D., & Kim, H. S. (2018). Boron doped ultrastrong and ductile high-entropy alloys. Acta Materialia. https://doi.org/10.1016/j.actamat.2018.04.004
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